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UNITED STATES PATENT LON GLEY LEIVIS SAGENDORPH, OF CINCINNATI, OHIO, ASSIGNOR OF ONE- HALF TO HARLAN P. LLOYD, OF SAME PLACE.

SHEET-METAL LOCK-JOINT.

SPECIFICATION forming part of Letters Patent No.- 425,002, dated April 8, 1890.

Application filed September 20, 1888. Serial No. 285,884. (No model.)

T at whom it may concern: said meeting ends of the sheets and flanges Be it known that I, LONGLEY LEWIS SA- for the greater width of the sheet, leaving GENDORPH, a citizen of the United States, respace enough at each side to form a standingsiding at Cincinnati, Hamilton county, State seam cap. The sheets at each side of the 5 of Ohio, have invented certain Improvements joint thus formed are bent in opposite angles, in Sheet-Metal Lock-Joints, of which the folas shown at a, thus bringing the sheets on the lowing is a specification, reference beinghad same plane. 5 to the accompanying drawings. The advantages of my invention are- The object of my invention is to provide a First, the sheets of metal thus locked canto flat lock-joint for the meeting ends of roofingnot become disengaged when rolled for shipsheets and in such a manner as to permit ment or in otherwise handling them. said sheets to be compactly rolled without Second, the joint thus formed is Waterdanger of separation and also afford awatertight, thus dispensing with the extra expense tight joint, thus dispensing with soldering, of soldering, which is quite an advantage.

I5 same, as will more fully hereinafter appear. Third, the sheets thus joined may be cut I-Ieretofore roofing-sheets have been joined at any desired length irrespective of the by the ordinary hooked joint consisting of joints and fitted on the roof, as the sheets the two interlocking flanges, as shown in Fig. are all on the same plane.

2, the flanges being pressed together against Fourth, the flat joint thus formed does not- 20 the meeting sheets; When joined in this interfere in any manner with the rolling or manner, the sheets are liable to and often do handling of the sheets, and from fifty to onebecome separated from handling and rolling. hundred feet of eight-foot sheets may be ad- Furthermore,'the joint thus formed must be vantageously rolled in one compact'bod y for soldered after being put to place on the roof, shipment.

25 which is quite an expense, which disadvan- I am aware that it is not new, broadly, to tages are overcome by the use of my invenform an interlocking joint, as shown in Flg. tion. 2. I am also aware that it is not new to form 7c In the accompanying drawings, Figure 1 is a depression. in the ridge-cap over a standing a side view of the meeting ends of two sheets seam to prevent said cap from slipping from 30 of metal having the interlocking flanges bent place; but

ready to be hooked together, and Fig. 2 is a hat I claim as new and of my invention similar view showing the flanges hooked toisv gether ready to become locked. Fig. 3 rep In metallic roofing, the roofing-plates havresents the look-joint complete. Fig. i is a ing their meeting edges united by the ordi- 35 top view of the end portions of two sheets nary lock or stove-pipe joint, the interlocking joined with my improved lock-joint. edges and flanges being made fast by indent- My invention consists in providing the ing the folded or interlocked portions, submeeting ends of the sheets to be joined with stantially as set forth. the interlocking flanges A, as shown in Fig. LONGLEY LEWIS SAGENDORPH 4o 1, which flanges are hooked together, as shown in Fig. 2. I now compress said flanges be- WVitnesses: tween the sheets with any suitable device HENRY IVOOST, and form an elongated beaded groove 13 in E. S. HAVENs. 

